Compilare: main.cpp: In function 'void Dfs(int)': main.cpp:13:20: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::pair<int, int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare] 13 | while(start[x] < L[x].size()) | ~~~~~~~~~^~~~~~~~~~~~~ main.cpp:15:24: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::pair<int, int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare] 15 | while(start[x] < L[x].size() && viz[L[x][start[x]].second] == 1) | ~~~~~~~~~^~~~~~~~~~~~~ main.cpp:17:21: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::pair<int, int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare] 17 | if(start[x] < L[x].size()) | ~~~~~~~~~^~~~~~~~~~~~~